Yes, that is the plan but the problem is no reliable test exists to date (https://www.businessinsider.com/coronavirus-antibody-test-g7-leaders-accuracy-covid-19-immunity-passports-2020-4?r=US&IR=T) and when it is available it will not be cheap and there will be a bloody long queue with the worlds wealthy and then major trading blocks in front of us. By the time the UK get it on the NHS, it should have all blown over anyhow.